I have used the Gator XP Broadheads for years but got a new parker thunderhawk crossbow last season. I ended up shooting 3 does and never recovered any of them. I believe I shot high on all 3. This has never happened. Husband says maybe Gator didnt open but I disagree. I think I just didnt realize how fast my new crossbow is. My question is this...how do I change the blades on my broadheads? I have the kits but they dont come with instructions. Anyone have any suggestions?